Using the "-=" syntax for a rotation tween no longer seems to work as it did previously in 1.14.2. Or, more specifically, it just behaves the same as "+=" as far as I can tell.
Here's a Codepen using 1.14.1 - the green square rotates the opposite way to the other two, as it should - http://codepen.io/anon/pen/VYwjgd
Here's the same Codepen using 1.14.2 - all the squares rotate the same way - http://codepen.io/anon/pen/MYWeLe
It seems to still work ok for other properties ("x" and "y", at least).
If I'm just doing something stupid, let me know, but I don't think that I am!